Aether

Aether, also called Empyrean Energy, is unstable divine energy that occupies the celestial spheres. It can only be manipulated by divine beings.
Arcane Energy, the stuff most mages use, is impure Aether that's been mixed with spiritual energy. Theoretically it could be distilled from arcana.
Sometimes the Aether doesn't mix with spiritual energy and it creates Blue Feysite.

Manifestation

Radiant and luminous blue energy

Localization

Celestial spheres

Type

Metaphysical, Divine